<!DOCTYPE html>
<style>
  .not-animated {
    display: inline-block;

    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: #eee;
  }

  .simple-animation {
    display: inline-block;

    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: red;

    animation: move 200s infinite;
  }

  .multiple-animations {
    display: inline-block;

    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: #eee;

    animation: move 200s infinite , glow 100s 5;
    animation-timing-function: ease-out;
    animation-direction: reverse;
    animation-fill-mode: both;
  }

  .transition {
    display: inline-block;

    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: #f06;

    transition: width 500s ease-out;
  }
  .transition.get-round {
    width: 200px;
  }

  .long-animation {
    display: inline-block;

    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: gold;

    animation: move 100s;
  }

  .short-animation {
    display: inline-block;

    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: purple;

    animation: move 1s;
  }

  .delayed-animation {
    display: inline-block;

    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: rebeccapurple;

    animation: move 200s 5s infinite;
  }

  .delayed-transition {
    display: inline-block;

    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: black;

    transition: width 500s 3s;
  }
  .delayed-transition.get-round {
    width: 200px;
  }

  .delayed-multiple-animations {
    display: inline-block;

    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: green;

    animation: move .5s 1s 10, glow 1s .75s 30;
  }

  .multiple-animations-2 {
    display: inline-block;

    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: blue;

    animation: move .5s, glow 100s 2s infinite, grow 300s 1s 100;
  }

  .all-transitions {
    position: absolute;
    top: 0;
    right: 0;
    width: 50px;
    height: 50px;
    background: blue;
    transition: all .2s;
  }
  .all-transitions.expand {
    width: 200px;
    height: 100px;
  }

  @keyframes move {
    100% {
      transform: translateY(100px);
    }
  }

  @keyframes glow {
    100% {
      background: yellow;
    }
  }

  @keyframes grow {
    100% {
      width: 100px;
    }
  }
</style>
<div class="not-animated"></div>
<div class="simple-animation"></div>
<div class="multiple-animations"></div>
<div class="transition"></div>
<div class="long-animation"></div>
<div class="short-animation"></div>
<div class="delayed-animation"></div>
<div class="delayed-transition"></div>
<div class="delayed-multiple-animations"></div>
<div class="multiple-animations-2"></div>
<div class="all-transitions"></div>
<script type="text/javascript">
  // Get the transitions started when the page loads
  var players;
  addEventListener("load", function() {
    document.querySelector(".transition").classList.add("get-round");
    document.querySelector(".delayed-transition").classList.add("get-round");
  });
</script>
